[U-Boot] [PATCH V5 02/12] video:mipidsim:fdt: Add DT support for mipi dsim driver
Piotr Wilczek
p.wilczek at samsung.com
Fri Mar 7 14:59:39 CET 2014
This patch enables parsing mipi data from device tree.
Non device tree case is still supported.
Signed-off-by: Piotr Wilczek <p.wilczek at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
Cc: Minkyu Kang <mk7.kang at samsung.com>
---
Changes for v5:
- add exynos_mipi_dsi.txt file with documented bindings
Changes for v4:
- use "-" hypen for DT bindings
Changes for v3:
- none
Changes for v2:
- removed panel specific init function 's6e8ax0_init' to the board file
arch/arm/include/asm/arch-exynos/mipi_dsim.h | 5 ++
doc/device-tree-bindings/video/exynos_mipi_dsi.txt | 82 ++++++++++++++++++
drivers/video/exynos_mipi_dsi.c | 96 ++++++++++++++++++++++
include/fdtdec.h | 1 +
lib/fdtdec.c | 1 +
5 files changed, 185 insertions(+)
create mode 100644 doc/device-tree-bindings/video/exynos_mipi_dsi.txt
diff --git a/arch/arm/include/asm/arch-exynos/mipi_dsim.h b/arch/arm/include/asm/arch-exynos/mipi_dsim.h
index 40aca71..50e5c25 100644
--- a/arch/arm/include/asm/arch-exynos/mipi_dsim.h
+++ b/arch/arm/include/asm/arch-exynos/mipi_dsim.h
@@ -12,6 +12,7 @@
#include <linux/list.h>
#include <linux/fb.h>
+#include <lcd.h>
#define PANEL_NAME_SIZE (32)
@@ -368,8 +369,12 @@ int exynos_mipi_dsi_register_lcd_device(struct mipi_dsim_lcd_device
*lcd_dev);
void exynos_set_dsim_platform_data(struct exynos_platform_mipi_dsim *pd);
+void exynos_init_dsim_platform_data(vidinfo_t *vid);
/* panel driver init based on mipi dsi interface */
void s6e8ax0_init(void);
+#ifdef CONFIG_OF_CONTROL
+extern int mipi_power(void);
+#endif
#endif /* _DSIM_H */
diff --git a/doc/device-tree-bindings/video/exynos_mipi_dsi.txt b/doc/device-tree-bindings/video/exynos_mipi_dsi.txt
new file mode 100644
index 0000000..4938ea0
--- /dev/null
+++ b/doc/device-tree-bindings/video/exynos_mipi_dsi.txt
@@ -0,0 +1,82 @@
+Exynos MIPI-DSIM Controller
+=========================
+
+Required properties:
+SOC specific:
+ compatible: should be "samsung,exynos-mipi-dsi"
+ reg: Base address of MIPI-DSIM IP.
+
+Board specific:
+ samsung,dsim-config-e-interface: interface to be used (RGB interface
+ for main display or CPU interface for main or sub display).
+ samsung,dsim-config-e-virtual-ch: virtual channel number that main
+ or sub display uses.
+ samsung,dsim-config-e-pixel-format: pixel stream format for main
+ or sub display.
+ samsung,dsim-config-e-burst-mode: selects Burst mode in Video mode.
+ in Non-burst mode, RGB data area is filled with RGB data and
+ NULL packets, according to input bandwidth of RGB interface.
+ samsung,dsim-config-e-no-data-lane: data lane count used by Master.
+ samsung,dsim-config-e-byte-clk: select byte clock source.
+ It must be DSIM_PLL_OUT_DIV8.
+ DSIM_EXT_CLK_DIV8 and DSIM_EXT_CLK_BYPASSS are not supported.
+ samsung,dsim-config-hfp: HFP disable mode.
+ If set, DSI master ignores HFP area in VIDEO mode.
+ In command mode, this variable is ignored.
+ samsung,dsim-config-p: P value for PMS setting.
+ samsung,dsim-config-m: M value for PMS setting.
+ samsung,dsim-config-s: S value for PMS setting.
+ samsung,dsim-config-pll-stable-time: the PLL Timer for stability
+ of the ganerated clock.
+ samsung,dsim-config-esc-clk: escape clock frequency for getting
+ the escape clock prescaler value.
+ samsung,dsim-config-stop-holding-cnt: the interval value between
+ transmitting read packet (or write "set_tear_on" command)
+ and BTA request. After transmitting read packet or write
+ "set_tear_on" command, BTA requests to D-PHY automatically.
+ This counter value specifies the interval between them.
+ samsung,dsim-config-bta-timeout: the timer for BTA. This register
+ specifies time out from BTA request to change the direction
+ with respect to Tx escape clock.
+ samsung,dsim-config-rx-timeout: the timer for LP Rx mode timeout.
+ this register specifies time out on how long RxValid deasserts,
+ after RxLpdt asserts with respect to Tx escape clock.
+ - RxValid specifies Rx data valid indicator.
+ - RxLpdt specifies an indicator that D-PHY is under RxLpdt mode
+ - RxValid and RxLpdt specifies signal from D-PHY.
+ samsung,dsim-device-name: name of the device.
+ samsung,dsim-device-id: unique device id.
+ samsung,dsim-device-bus_id: bus id for identifing connected bus
+ and this bus id should be same as id of mipi_dsim_device.
+
+Optional properties:
+ samsung,dsim-device-reverse-panel: reverse panel.
+
+Example:
+ mipidsi at 11c80000 {
+ compatible = "samsung,exynos-mipi-dsi";
+ reg = <0x11c80000 0x5c>;
+
+ samsung,dsim-config-e-interface = <1>;
+ samsung,dsim-config-e-virtual-ch = <0>;
+ samsung,dsim-config-e-pixel-format = <7>;
+ samsung,dsim-config-e-burst-mode = <1>;
+ samsung,dsim-config-e-no-data-lane = <3>;
+ samsung,dsim-config-e-byte-clk = <0>;
+ samsung,dsim-config-hfp = <1>;
+
+ samsung,dsim-config-p = <3>;
+ samsung,dsim-config-m = <120>;
+ samsung,dsim-config-s = <1>;
+
+ samsung,dsim-config-pll-stable-time = <500>;
+ samsung,dsim-config-esc-clk = <20000000>;
+ samsung,dsim-config-stop-holding-cnt = <0x7ff>;
+ samsung,dsim-config-bta-timeout = <0xff>;
+ samsung,dsim-config-rx-timeout = <0xffff>;
+
+ samsung,dsim-device-id = <0xffffffff>;
+ samsung,dsim-device-bus-id = <0>;
+
+ samsung,dsim-device-reverse-panel = <1>;
+ };
diff --git a/drivers/video/exynos_mipi_dsi.c b/drivers/video/exynos_mipi_dsi.c
index 8bb8fea..7dd4652 100644
--- a/drivers/video/exynos_mipi_dsi.c
+++ b/drivers/video/exynos_mipi_dsi.c
@@ -9,6 +9,8 @@
#include <common.h>
#include <malloc.h>
+#include <fdtdec.h>
+#include <libfdt.h>
#include <linux/err.h>
#include <asm/arch/dsim.h>
#include <asm/arch/mipi_dsim.h>
@@ -22,7 +24,14 @@
#define master_to_driver(a) (a->dsim_lcd_drv)
#define master_to_device(a) (a->dsim_lcd_dev)
+DECLARE_GLOBAL_DATA_PTR;
+
static struct exynos_platform_mipi_dsim *dsim_pd;
+#ifdef CONFIG_OF_CONTROL
+static struct mipi_dsim_config dsim_config_dt;
+static struct exynos_platform_mipi_dsim dsim_platform_data_dt;
+static struct mipi_dsim_lcd_device mipi_lcd_device_dt;
+#endif
struct mipi_dsim_ddi {
int bus_id;
@@ -238,3 +247,90 @@ void exynos_set_dsim_platform_data(struct exynos_platform_mipi_dsim *pd)
dsim_pd = pd;
}
+
+#ifdef CONFIG_OF_CONTROL
+int exynos_dsim_config_parse_dt(const void *blob)
+{
+ int node;
+
+ node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_MIPI_DSI);
+ if (node <= 0) {
+ printf("exynos_mipi_dsi: Can't get device node for mipi dsi\n");
+ return -ENODEV;
+ }
+
+ dsim_config_dt.e_interface = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-e-interface", 0);
+
+ dsim_config_dt.e_virtual_ch = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-e-virtual-ch", 0);
+
+ dsim_config_dt.e_pixel_format = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-e-pixel-format", 0);
+
+ dsim_config_dt.e_burst_mode = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-e-burst-mode", 0);
+
+ dsim_config_dt.e_no_data_lane = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-e-no-data-lane", 0);
+
+ dsim_config_dt.e_byte_clk = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-e-byte-clk", 0);
+
+ dsim_config_dt.hfp = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-hfp", 0);
+
+ dsim_config_dt.p = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-p", 0);
+ dsim_config_dt.m = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-m", 0);
+ dsim_config_dt.s = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-s", 0);
+
+ dsim_config_dt.pll_stable_time = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-pll-stable-time", 0);
+
+ dsim_config_dt.esc_clk = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-esc-clk", 0);
+
+ dsim_config_dt.stop_holding_cnt = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-stop-holding-cnt", 0);
+
+ dsim_config_dt.bta_timeout = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-bta-timeout", 0);
+
+ dsim_config_dt.rx_timeout = fdtdec_get_int(blob, node,
+ "samsung,dsim-config-rx-timeout", 0);
+
+ mipi_lcd_device_dt.name = fdtdec_get_config_string(blob,
+ "samsung,dsim-device-name");
+
+ mipi_lcd_device_dt.id = fdtdec_get_int(blob, node,
+ "samsung,dsim-device-id", 0);
+
+ mipi_lcd_device_dt.bus_id = fdtdec_get_int(blob, node,
+ "samsung,dsim-device-bus_id", 0);
+
+ mipi_lcd_device_dt.reverse_panel = fdtdec_get_int(blob, node,
+ "samsung,dsim-device-reverse-panel", 0);
+
+ return 0;
+}
+
+void exynos_init_dsim_platform_data(vidinfo_t *vid)
+{
+ if (exynos_dsim_config_parse_dt(gd->fdt_blob))
+ debug("Can't get proper dsim config.\n");
+
+ strcpy(dsim_platform_data_dt.lcd_panel_name, mipi_lcd_device_dt.name);
+ dsim_platform_data_dt.dsim_config = &dsim_config_dt;
+ dsim_platform_data_dt.mipi_power = mipi_power;
+ dsim_platform_data_dt.phy_enable = set_mipi_phy_ctrl;
+ dsim_platform_data_dt.lcd_panel_info = (void *)vid;
+
+ mipi_lcd_device_dt.platform_data = (void *)&dsim_platform_data_dt;
+ exynos_mipi_dsi_register_lcd_device(&mipi_lcd_device_dt);
+
+ dsim_pd = &dsim_platform_data_dt;
+}
+#endif
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 19bab79..bd84c83 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -79,6 +79,7 @@ enum fdt_compat_id {
COMPAT_SAMSUNG_EXYNOS5_USB3_PHY,/* Exynos phy controller for usb3.0 */
COMPAT_SAMSUNG_EXYNOS_TMU, /* Exynos TMU */
COMPAT_SAMSUNG_EXYNOS_FIMD, /* Exynos Display controller */
+ COMPAT_SAMSUNG_EXYNOS_MIPI_DSI, /* Exynos mipi dsi */
COMPAT_SAMSUNG_EXYNOS5_DP, /* Exynos Display port controller */
COMPAT_SAMSUNG_EXYNOS5_DWMMC, /* Exynos5 DWMMC controller */
COMPAT_SAMSUNG_EXYNOS_SERIAL, /* Exynos UART */
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 1fecab3..c97fad3 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -52,6 +52,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
+ COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
COMPAT(SAMSUNG_EXYNOS5_DWMMC, "samsung,exynos5250-dwmmc"),
COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
--
1.8.3.2
More information about the U-Boot
mailing list